Introduction to Kingdom Animalia

Characteristics of Animals

HeterotrophicMulticellularMovementEukaryotic

Basic Embryology

Define:ZygoteEmbryoBlastulaGastrula

Embryonic Germ Layers

Ectoderm – outside layerMesoderm – middle layerEndoderm – inside layer

LAYER ORGAN & ORGAN SYSTEM

Ectoderm Nervous system

Skin

Mesoderm Muscles

Circulatory System

Skeletal System

Reproductive System

Endoderm Lining of gut and respiratory tracts

Liver

Pancreas

Animals With No Embryonic Stages

SpongesCnidariansCtenophorans

Protostomes – blastopore becomes mouth

Acoelomates – no body cavity– Platyhelminthes

Draw the acoelomate body plan in your notes here.

Pseudocoelomates – fake body cavity– Nematodes

Draw the pseudocoelomate body plan in your notes here.

Deuterostomes – blastopore becomes anus All are Eucoelomates – true body

cavity– Mollusks– Annelids– Arthropods– Echinoderms– Chordates

Draw the eucoelomate body plan in your notes here.

Symmetry

Assymmetry –Irregular shapes

–Do not move

–Sponges

Symmetry

Radial Symmetry–Can divide into equal halves

using many planes

–Cnidaria (stinging animals)

–Echinoderms (sea stars)

SymmetryCan only divide into left & right

halvesMost efficient for movement

– Flatworms

– Roundworms

– Mollusks

– Segmented Worms

– Chordates

Anatomical Positions

ANTERIORPOSTERIOR

DORSAL

VENTRAL